The Phantom Virus was a glowing humanoid made of electrical energy with a seemingly artificial intelligence. It was mainly light blue in color and only clothed for disguise.
It had an obsession with baseball mirrored by its creator, which was the gang's main clue as to who the culprit was. It had the ability to extract data from various electrical devices, as well as control machines and cables. The Virus was however, weak in close proximity to magnets causing agonizing deformation or even the inability to move. It is unknown if Bill could control the Virus or if the Virus recognized Bill as its creator.
Powers and abilities
He had the ability to steal the network and data from every computer in the world. He was also able to control aspects of Eric's game; for example, the cyber villains that Scooby and the gang faced in the game were all under the control of the virus (however he seemed to be unable to control Mystery Inc.'s cyber counterparts). He could also shoot lightning. In the final level in the game, he created a giant source of balls flying around all over the place like a tornado and tampered with devices in the arcade, making them go haywire by either shooting balls or pucks (sports games) or making them sentient and attack the gang or trap them with wires (regular games).
Scooby-Doo and the Cyber Chase
A laser for transferring material items into the virtual world was also used to extract the Phantom Virus into the college campus in the real world. There it would wreak havoc and prevent Eric from winning the prize which Bill thought he deserved due to being a longer standing student. Once the gang were beamed into the game, they competed with the virus, who was the "boss" of various monsters in different locations within the game. To defeat the virus, the gang had to find the Scooby Snacks box in each level and progress to the end. The virus had minions in the games such as the two Moon Ghosts, three skeleton gladiators with a lion, a T-Rex, a camel, a dragon, a polar bear, and five of the monsters from the gang's past.
In the final level, it used the classic monsters to hamper the gang and their cyber counterparts, but eventually they made it to the arcade where the final snack book was. When the gang made it there, the virus appeared and started making the games go haywire, wrapping up most of the real gang and forcing Scooby to hide. The monsters trapped all the gangs counterparts except for Cyber Scooby. At first, Cyber Scooby tried to free Fred, but Fred came up with a plan to get the box and Cyber Scooby let the still untrapped Scooby in on the plan. Cyber Scooby got the virus's attention and kept it busy with the Real Scooby snuck behind him to get the box. The Virus eventually caught Cyber Scoob but was too late to stop the real Scooby, just after he caught him the monster turned around and looked in horror as Scooby secured the box. The minute Scooby picked it up, the virus started to become deformed, the arcade went back to normal, and the monster disappeared. The rest of the gang's digital counterparts walked in just in time to see the virus disappear from existence forever.
- The Phantom Virus looks similar to the Ice Demon from the A Pup Named Scooby-Doo episode, Snow Place Like Home.
- The fact the virus is scared of/hurt by magnets may be a reference to how magnets harm computers.